[chore][receiver/hostmetrics] create metadata (#21827)

Created Metadata file and added stability + type changes.
Link to tracking Issue: #21213

receiver/hostmetricsreceiver/README.md

@@ -1,10 +1,18 @@
 # Host Metrics Receiver
 
-| Status                   |                                                 |
-| ------------------------ |-------------------------------------------------|
-| Stability                | [beta]                                          |
-| Supported pipeline types | metrics                                         |
-| Distributions            | [core], [contrib], [observiq], [splunk], [sumo] |
+<!-- status autogenerated section -->
+| Status        |           |
+| ------------- |-----------|
+| Stability     | [beta]: metrics   |
+| Distributions | [core], [contrib], [observiq], [splunk], [sumo] |
+
+[beta]: https://github.com/open-telemetry/opentelemetry-collector#beta
+[core]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol
+[contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib
+[observiq]: https://github.com/observIQ/observiq-otel-collector
+[splunk]: https://github.com/signalfx/splunk-otel-collector
+[sumo]: https://github.com/SumoLogic/sumologic-otel-collector
+<!-- end autogenerated section -->
 
 The Host Metrics receiver generates metrics about the host system scraped
 from various sources. This is intended to be used when the collector is
@@ -179,9 +187,3 @@ Currently, the hostmetrics receiver does not set any Resource attributes on the
 export OTEL_RESOURCE_ATTRIBUTES="service.name=<the name of your service>,service.namespace=<the namespace of your service>,service.instance.id=<uuid of the instance>"
 ```
 
-[beta]: https://github.com/open-telemetry/opentelemetry-collector#beta
-[contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib
-[core]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol
-[splunk]: https://github.com/signalfx/splunk-otel-collector
-[observiq]: https://github.com/observIQ/observiq-otel-collector
-[sumo]: https://github.com/SumoLogic/sumologic-otel-collector

receiver/hostmetricsreceiver/config_test.go

@@ -16,6 +16,7 @@ import (
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/internal/filter/filterset"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/metadata"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/cpuscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/diskscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/filesystemscraper"
@@ -32,23 +33,23 @@ func TestLoadConfig(t *testing.T) {
 	require.NoError(t, err)
 
 	factory := NewFactory()
-	factories.Receivers[typeStr] = factory
+	factories.Receivers[metadata.Type] = factory
 	cfg, err := otelcoltest.LoadConfigAndValidate(filepath.Join("testdata", "config.yaml"), factories)
 
 	require.NoError(t, err)
 	require.NotNil(t, cfg)
 
 	assert.Equal(t, len(cfg.Receivers), 2)
 
-	r0 := cfg.Receivers[component.NewID(typeStr)]
+	r0 := cfg.Receivers[component.NewID(metadata.Type)]
 	defaultConfigCPUScraper := factory.CreateDefaultConfig()
 	defaultConfigCPUScraper.(*Config).Scrapers = map[string]internal.Config{
 		cpuscraper.TypeStr: (&cpuscraper.Factory{}).CreateDefaultConfig(),
 	}
 
 	assert.Equal(t, defaultConfigCPUScraper, r0)
 
-	r1 := cfg.Receivers[component.NewIDWithName(typeStr, "customname")].(*Config)
+	r1 := cfg.Receivers[component.NewIDWithName(metadata.Type, "customname")].(*Config)
 	expectedConfig := &Config{
 		ScraperControllerSettings: scraperhelper.ScraperControllerSettings{
 			CollectionInterval: 30 * time.Second,
@@ -92,7 +93,7 @@ func TestLoadInvalidConfig_NoScrapers(t *testing.T) {
 	require.NoError(t, err)
 
 	factory := NewFactory()
-	factories.Receivers[typeStr] = factory
+	factories.Receivers[metadata.Type] = factory
 	_, err = otelcoltest.LoadConfigAndValidate(filepath.Join("testdata", "config-noscrapers.yaml"), factories)
 
 	require.Contains(t, err.Error(), "must specify at least one scraper when using hostmetrics receiver")
@@ -103,7 +104,7 @@ func TestLoadInvalidConfig_InvalidScraperKey(t *testing.T) {
 	require.NoError(t, err)
 
 	factory := NewFactory()
-	factories.Receivers[typeStr] = factory
+	factories.Receivers[metadata.Type] = factory
 	_, err = otelcoltest.LoadConfigAndValidate(filepath.Join("testdata", "config-invalidscraperkey.yaml"), factories)
 
 	require.Contains(t, err.Error(), "error reading configuration for \"hostmetrics\": invalid scraper key: invalidscraperkey")

receiver/hostmetricsreceiver/doc.go

@@ -1,5 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
+//go:generate mdatagen metadata.yaml
+
 // Package hostmetricsreceiver reads metrics like CPU usage, disk usage, and network usage from the host.
 package hostmetricsreceiver // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver"

receiver/hostmetricsreceiver/factory.go

@@ -14,6 +14,7 @@ import (
 	"go.opentelemetry.io/collector/receiver/scraperhelper"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/metadata"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/cpuscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/diskscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/filesystemscraper"
@@ -26,14 +27,6 @@ import (
 )
 
 // This file implements Factory for HostMetrics receiver.
-
-const (
-	// The value of "type" key in configuration.
-	typeStr = "hostmetrics"
-	// The stability level of the host metrics receiver.
-	stability = component.StabilityLevelBeta
-)
-
 var (
 	scraperFactories = map[string]internal.ScraperFactory{
 		cpuscraper.TypeStr:        &cpuscraper.Factory{},
@@ -51,9 +44,9 @@ var (
 // NewFactory creates a new factory for host metrics receiver.
 func NewFactory() receiver.Factory {
 	return receiver.NewFactory(
-		typeStr,
+		metadata.Type,
 		createDefaultConfig,
-		receiver.WithMetrics(createMetricsReceiver, stability))
+		receiver.WithMetrics(createMetricsReceiver, metadata.MetricsStability))
 }
 
 func getScraperFactory(key string) (internal.ScraperFactory, bool) {
@@ -66,7 +59,7 @@ func getScraperFactory(key string) (internal.ScraperFactory, bool) {
 
 // createDefaultConfig creates the default configuration for receiver.
 func createDefaultConfig() component.Config {
-	return &Config{ScraperControllerSettings: scraperhelper.NewDefaultScraperControllerSettings(typeStr)}
+	return &Config{ScraperControllerSettings: scraperhelper.NewDefaultScraperControllerSettings(metadata.Type)}
 }
 
 // createMetricsReceiver creates a metrics receiver based on provided config.

receiver/hostmetricsreceiver/hostmetrics_linux_test.go

@@ -15,6 +15,7 @@ import (
 	"go.opentelemetry.io/collector/otelcol/otelcoltest"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/metadata"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/cpuscraper"
 )
 
@@ -36,12 +37,12 @@ func TestLoadConfigRootPath(t *testing.T) {
 	t.Setenv("HOST_PROC", "testdata")
 	factories, _ := otelcoltest.NopFactories()
 	factory := NewFactory()
-	factories.Receivers[typeStr] = factory
+	factories.Receivers[metadata.Type] = factory
 	cfg, err := otelcoltest.LoadConfigAndValidate(filepath.Join("testdata", "config-root-path.yaml"), factories)
 	require.NoError(t, err)
 	globalRootPath = ""
 
-	r := cfg.Receivers[component.NewID(typeStr)].(*Config)
+	r := cfg.Receivers[component.NewID(metadata.Type)].(*Config)
 	expectedConfig := factory.CreateDefaultConfig().(*Config)
 	expectedConfig.RootPath = "testdata"
 	cpuScraperCfg := (&cpuscraper.Factory{}).CreateDefaultConfig()
@@ -54,7 +55,7 @@ func TestLoadConfigRootPath(t *testing.T) {
 func TestLoadInvalidConfig_RootPathNotExist(t *testing.T) {
 	factories, _ := otelcoltest.NopFactories()
 	factory := NewFactory()
-	factories.Receivers[typeStr] = factory
+	factories.Receivers[metadata.Type] = factory
 	_, err := otelcoltest.LoadConfigAndValidate(filepath.Join("testdata", "config-bad-root-path.yaml"), factories)
 	assert.ErrorContains(t, err, "invalid root_path:")
 	globalRootPath = ""

receiver/hostmetricsreceiver/metadata.yaml

@@ -0,0 +1,8 @@
+type: hostmetrics
+
+status:
+  class: receiver
+  stability:
+    beta: [metrics]
+  distributions: [core, contrib, observiq, splunk, sumo]
+